NSA Security Config Guides

The 60 Minute Network Security Guide (2006)

The Windows Server 2003 - Security Guide, v2.1 (2006)

Guide to Secure Configuration and Administration of Microsoft SQL Server 2000 (2003)

Guide to Secure Configuration and Administration of Microsoft Internet Information Services 5.0 version 1.4 (2004)

Guide to Microsoft .NET Framework Security (2006)

Apple Mac OS X v10.3.x "Panther" Security Configuration Guide (2005)

Guide to Securing Microsoft Windows XP (2003)

Many more can be found here.